Tracking and handling of super-hot data in non-volatile memory systems
US9141528B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 2012 |
| Grant date | Sep 22, 2015 |
| Priority date | — |
| Expiry date | Apr 7, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/7211
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A non-volatile memory organized into flash erasable blocks sorts units of data according to a temperature assigned to each unit of data, where a higher temperature indicates a higher probability that the unit of data will suffer subsequent rewrites due to garbage collection operations. The units of data either come from a host write or from a relocation operation. Among the units more likely to suffer subsequent rewrites, a smaller subset of data super-hot is determined. These super-hot data are then maintained in a dedicated portion of the memory, such as a resident binary zone in a memory system with both binary and MLC portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.